I think btc is very expensive now, if you do not want to invest in,
If the person really wants to invest in bitcoin that person doesnt need to buy the as a whole
BTC, he/she can buy a smaller amount to begin tradings, of course it will have also small returns but as the person progress in trading investment will also grow.
you can join in bounties and sell the reward altcoins to btc after this coin listed on an exchange.
It could eventually be viable when you really want to invest in bitcoin without releasing any money at your disposal.